I am back!!

Yes you read it right.. I am back after almost 2 years and will be writing exciting new stuff very soon! I do apologize for this long break as I had some work and family committments but have now decided to start giving some time to this blog and bring it back to life. I know most of you have got in touch with me asking as to why I am not writing anymore and how they use to enjoy reading my stuff so that has kind of motivated me to come back! Thank you. Some of you old subscribers … Continue reading I am back!!

iPhone 4 Battery Drain – Some Tips

OK, this is different of what I use to write but I think it would be helpful for all iphone 4 users. I had my iphone 4 few days back and I was quite impressed by this new smartphone until I realized the phone is draining my battery like a Ferrari sucks up fuel. All that iphone 4 claims of long life battery etc seems rubbish to me. I went through several forums and did some tests to come up with some guidance notes to avoid battery drain for iPhone 4. This can also be used for other iphone generations. … Continue reading iPhone 4 Battery Drain – Some Tips

Codec Bandwidth Calculation G711/G729

RTP: Voice payloads are encapsulated by RTP, then by UDP, then by IP. A Layer 2 header of the correct format is applied; the type obviously depends on the link technology in use by each router interface. A single voice call generates two one-way RTP/UDP/IP packet streams. UDP provides multiplexing and checksum capability; RTP provides payload identification, timestamps, and sequence numbering. Each RTP stream is accompanied by a Real-Time Transport Control Protocol (RTCP) stream. RTCP monitors the quality of the RTP stream, allowing devices to record events such as packet count, delay, loss, and jitter (delay variation). A single voice … Continue reading Codec Bandwidth Calculation G711/G729

Useful Parameters

Following are useful parameters to be changed all in one go: Enterprise Parameters: Auto Registration Phone Protocol = SCCP << Very Important if this is SIP then all your phones will load SIP firmware Connection Monitor Duration = 10  << Default is 120, by minimizing the time duration, you can speed up your the process of your phones falling back to Primary Call manager from SRST Phone URL Parameters = Change the hostnames to IP addresses << If this is not done then many phone services will not be accessible. Service Parameters: T302 Timer = 5000  << Interdigit time-out G722 … Continue reading Useful Parameters

Upgrade Process

This is just notes to myself as after downloading the upgrade files for CUCM or Unity or anything else…we all need to follow the same process of combining them and then verifiying the hash value. Download FCIV. Download the files as required: UCS_Install_UCOS_7.1.3.32900-4.sgn.iso_part1of2 UCS_Install_UCOS_7.1.3.32900-4.sgn.iso_part2of2 Run the following command to combine these files into one .iso file COPY /B C:\UCS_Install_UCOS_7.1.3.32900-4.sgn.iso_part1of2+C:\UCS_Install_UCOS_7.1.3.32900-4.sgn.iso_part2of2 C:\UCSInstall_UCOS_7.1.3.32900-4.sgn.iso UCSInstall_UCOS_7.1.3.32900-4.sgn.iso Use a checksum generator to confirm that the MD5 checksum of the reunited file matches the following checksum: d450666dafbc8f01c111ed0158f748fb If the values do not match, the reunited file is damaged. C:\>cd fciv C:\FCIV>fciv.exe c:\UCSInstall_UCOS_7.1.3.32900-4.sgn.iso // // File Checksum Integrity Verifier … Continue reading Upgrade Process

CCIE Voice Lab Strategy

CCIE Lab is one of the toughest IT exam out there and I believe CCIE Voice is “the” toughest (I am not making this up, this has been acknowledged by Quad/Triple CCIEs) as it involves so many applications which can break and go wrong so easily if you are not good in configuring them. Making everything work in a matter of 8 hours and that too as per Lab directions really need a sound preparation, experience and Strategy. To be very honest, I just had one year experience in Voice before I started preparing for the exam. I had quite … Continue reading CCIE Voice Lab Strategy